505213644666 has 8 divisors (see below), whose sum is σ = 1010427289344. Its totient is φ = 168404548220.

The previous prime is 505213644589. The next prime is 505213644667. The reversal of 505213644666 is 666446312505.

It is a sphenic number, since it is the product of 3 distinct primes.

505213644666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (505213644667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42101137050 + ... + 42101137061.

It is an arithmetic number, because the mean of its divisors is an integer number (126303411168).

Almost surely, 2^505213644666 is an apocalyptic number.

505213644666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505213644666 is a wasteful number, since it uses less digits than its factorization.

505213644666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84202274116.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 505213644666 in words is "five hundred five billion, two hundred thirteen million, six hundred forty-four thousand, six hundred sixty-six".